Computational geometry is an important field of computer science.

He drew a triangle on the blackboard.

I am working using a spreadsheet software.

The time complexity of this algorithm is O(n).

This rock is rich in silicate.

He was born as an illegitimate child and experienced many difficulties.

My grandfather used to till his privately-owned rice field.

Using the private railway makes commuting very convenient.

We respect Japanese culture.

We are going on a trip tomorrow.